Need Something To Sac To But No Big Deal

Flying When this creature enters, you skip your next turn. When this creature leaves the battlefield, you take an extra turn after this one.

You may choose not to untap this artifact during your untap step. , : Gain control of target creature with power less than or equal to the number of Islands you control for as long as this artifact remains tapped.

Each creature has "When this creature dies, choose target opponent. That player puts this card from its owner's graveyard onto the battlefield under their control at the beginning of the next end step."